* Reduced the number of parameters passed to ui.validityproblem() because they were all just method-calls to the folder object, which is already passed as the first parameter (reduction of unnecessary complexity).
* Improved the diagnostic message for an 'UID validity problem' by including the name of the repository in which the folder resides; previously it was not possible to determine from the diagnostic alone on which side the problem was.
It looks like I accidentally recorded the wrong version of Curses.py --
originally this code was there, but I moved it over to UIBase so it would
cover the TTY UI also.
